Congruent triangles, a math problem-practice while doing it. Thank you, if possible.

1, as shown in the figure, A, B, E and F are on a straight line, AC=BD, CE=DF and AF=BE. Verification:

△ACE?△BDF

2. It is known that B, E, C and F are on a straight line, BE=CF, AB=DE and AC=DF.

Proof: △ ABC △ def.

3. As shown in the figure, in △ABC, D is the midpoint of BC side, AB=AC, and verification: ∠ B = ∠ C.

4. Known: As shown in the figure, AB=DC, AD=BC, and verification: ∠ A = ∠ C.

5. Known: As shown in the figure, AB = AC, AD = AE, BD = CE. Verification: ∠ BAC = ∠ DAE.